-LRB- CNN -RRB- -- Manchester United ended 10-man Chelsea 's hopes of winning a trophy this season with a 2-1 home victory that put Alex Ferguson 's side into the semifinals of the Champions League for the fourth time in five seasons .

A goal in each half from Javier Hernandez and Park Ji-Sung ensured a 3-1 aggregate win for the English Premier League leaders , who beat Chelsea in the 2008 final on penalties in Moscow .

United will next face either defending European champions Inter Milan or Schalke , who hold a 5-2 lead ahead of Wednesday 's second leg in Germany .

The future of Chelsea coach Carlo Ancelotti is now in considerable doubt after a disappointing season which has seen the London side 's domestic title reign realistically over with seven games to play .

Ancelotti in troubled waters at the Bridge

The Italian raised eyebrows when he chose to start misfiring $ 80 million signing Fernando Torres up front with Nicolas Anelka and Florent Malouda flanking him , leaving former spearhead Didier Drogba on the bench .

The Ivory Coast striker made an immediate impact after replacing Torres at halftime , and got Chelsea back into the match soon after Ramires ' 70th-minute sending-off -- only for poor defending to allow United to regain a two-goal overall lead straight away .

`` A lot of people thought Drogba would play , '' Ferguson told reporters . `` I thought having signed Torres for the money they did they had to play him . I was n't 100 % sure but I could n't see how they could leave Torres out . ''

Ancelotti admitted he might have made a mistake in starting the Spain striker , who has not scored since leaving Liverpool at the end of January .

`` Maybe . Could be . I told you a lot of times this season I wanted to start with Fernando for this kind of game , these type of tactics , '' the former AC Milan coach said .

`` Didier played well in the second half . I wanted to put more pressure up front because we needed to score . Didier was fresh and he could use his power up front . This was the reason I took out Fernando . ''

The home side , having survived some early scares , thought they had scored in the 27th minute when Hernandez stole in at the near post to head home Wayne Rooney 's cross , but the Mexico international strayed marginally offside .

The breakthrough came two minutes before halftime as veteran Ryan Giggs combined well with John O'Shea to burst into the right side of the penalty area and slide a pinpoint low cross with his favored left foot to an unmarked Hernandez at the far post .

Messi record as Barcelona go through

Ancelotti replaced Anelka , the club 's top scorer in Europe this season , with Salomon Kalou after an hour but United could have gone further ahead as goalkeeper Petr Cech did well to keep out a low shot from Nani and then Giggs aimed a weak header after more good work by Rooney .

Ramires , who was denied a penalty in injury-time in the first leg at Stamford Bridge last week , received his second yellow card after a tackle from behind on Nani .

The first , also for a foul on the Portugal midfielder in the opening half , had already meant the Brazil midfielder would have been suspended for the first leg of the semifinal if Chelsea had progressed .

With Nani replaced by Antonio Valencia in the 75th minute , Chelsea took advantage to level on the night as Michael Essien picked out Drogba with a lofted through pass and the 33-year-old chested the ball down and fired a low shot past Edwin van der Sar .

Rooney gives Manchester United the edge

But Chelsea 's excitement lasted less than 30 seconds as United surged forward , with Rooney and Giggs combining to set up hard-working South Korean midfielder Park -- who slotted in a low left-foot shot .

It was the 37-year-old Giggs ' third assist of the quarterfinal , having also set up Rooney 's first-leg winner .

The win kept United , the European runners-up in 2009 , on course for a treble this season ahead of Saturday 's FA Cup semifinal against local rivals Manchester City .

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Manchester United win all-English semifinal 3-1 on aggregate after home victory

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Javier Hernandez and Park Ji-Sung score either side of Didier Drogba 's equalizer

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Veteran Ryan Giggs sets up both United goals to add to his first-leg assist

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Chelsea coach Carlo Ancelotti faces the sack as last chance of silverware ends